Purveying device



Patented May 420, 1919.4

G. N. WOODWARD.

PURVEYING DEVICE. APPLICATION man :uw-16.1911.

terial, in which the f UNTTED sTATEs PATENT onirica.`

GILBERT N. WOODWABD, OF PORTLAND, OREGON.

PURVEYING DEVICE.

To all whom it may concern.'

Be it known that I, GILBERT N. WoonwARn, a citizen of the United States,residing at Portland, county of Multnomah, State of Oregon, haveinvented certain new and useful Improvements in Purveying Devices, ofwhich the followingis a specification.

My invention relates to purveying devices in general, and particularlyto that class of such devices as are used for the automatic purveying ofliquids, such as gasolene at automobile filling stations, and the like.

The objects of my invention are to provide' a purveying device that willaccurately measure the liquid delivered therefrom; that may be adjustedand sealed; that will measure the liquid dispensed withinsight of thepurchaser; and thatY will not be disturbed in the accuracy of itsfunctions by dirt, sediment or. scale in the liquid;

I accomplish the abovevobjects, and other desirable results, by means ofthe construction illustrated in ing, which therefore becomes a part ofthis application for Letters Patent, and which shows a side elevation ofmy devicewith parts broken away to best illustrate the construction andoperation.

In general my device consists of a pair of reservoirs 1, of glass orother suitable maliquid is measured, and into which the liquid isdelivered through a supply pipe 2, and means whereby one of saidreservoirs is delivering measured liquid while the other is beingfilled, said means being operated by the liquid within the containerbeing filled.

As a means of distributing the liquid I provide an ordinary slide valve3 operating over ports 4 and 5, the said ports each connecting with itsrespective reservoir by means of respective passage-ways 8, saidpassage-ways each connecting with a delivery pipe 6 wherein is a checkvalve 7.

The liquid enters valve chamber 9 through supply pipe 2, being deliveredthereto by a suitable pump, or by gravity from an over head tank, or inany other suitable and convenient manner, and passes therefrom by meansof one of ports 4 and corresponding passage-way 8 to one of thereservoirs 1, that upon the right in the drawing.

the accompanying draw-4,

The oat valve 10 is raised by the entering liquid as far as the cage 11will permit. The liquid then fills the reservoir 1 and finally overflowstherefrom throughvalve chamber 12 and pipe 13 leading therefrom. Pipe 13connects with a cylinder 16 at that end of valve chamber 9 opposite thereservoir 1 with which said pipe 13 is connected, thus conveying liquidfrom said reservoir 1 to said cylinder 16 to act as a fluid pressureagent for moving valve 3 by means of piston is connected to valve 3. v Adrainage-pipe 17 is supplied for draining cylinders 16 which pipe leadsback to the supply tank or pump, as convenient.

When theV liquidr in reservoir 1 (right hand) has overflowed into thepipe 13. connected thereto, pistons 14 will be forced to the right andthus move valve 3 to the right so as toopen left hand port 4 to valvechamber 9 and connect right hand port 4 to port 5.

Left hand reservoir 1 will then fill with liquid, while right handreservoir 1 will discharge its contained liquid by gravity into pipe 6by means of passage-way 8 and ports 4 and 5.

When left hand reservoir 1 is filled the reverse action will take place,the reservoirs will, therefore, obviously automatically alternately filland dispense with the liquid being purveyed, as long as pressure ismaintained upon the liquid in supply pipe 2.

' As a means of accurately measuring the liquid in each reservoir andadjusting the same, I provide a piston 18 disposed within a tube 19integral with and depending from reservoir head 20. 1

Said piston 18 is operated and adjusted vertically by means of a screw21 threaded i into head 20 and attached to piston 18, so

that the amount of liquid contained within reservoir 1 may be decreasedor increased by respectively lowering or raising piston 18.

A cap 22 covers screw 21 and may be sealed to head 20 by means of anordinary wire seal, as shown at 23.

Valve chambers 12 are connected by air pipe 24, by which the airexpelled from the filling reservoir by the liquid entering therein istransferred to the discharging reser- Specication of Letters Patent. iPatented Biggy 20, 1919, l Application filed July 16, 1917. Serial No.180,854. I

25 adapted' tov rais'e'and cl'ose'the enduit-pipeA the reservoir 24 whenthe liquid has filled and entered the chamber l2, thus then directingall the liquid under pressure into pipe 13 and thereby into cylinder 16,.for the purpose of moving valve 3.

Float valves l0 are for the purpose of closing before the liquid isentirely expelled and thus preventing' the escapeof the air Withinthetwo reservoirs and their connecting pipe 24. .A A

VThe air pressure may be made as great Vas desired by introducing air inany convenient manner, suitably by opening the air cock of the'pumpsupplying the liquid toV pipe 2 until sufficient pressure is obtained.

A safety valve 25a is installed in vpipe 24. My invention may be made ofany size and constructed of any materials deemed convenient and suitablefor .a device of this character, and While I have illustrated anddescribed a form of construction and arf rangement of parts founddesirable in materializing my invention, I Wish to include in thisapplication for Letters Patent all mechanical equivalents andsubstitutes that may fairly be considered 'to :come Within the scope andpurview of my invention as defined in the appended claim. Havingdisclosed my invention so that others skilled in the art may be ena'bledto Copies of this lpatent may be obtained for `ve poents each, 'byaddressing `the Y Washington,v ILUA ing-a."pair of reservoirs; a valveintermedi- .ate said reservoirs-s; .a

discharge pipe; a piston connected to said valve and operating Within yacylinder; a body connecting said reservoirs and having therein suitableports coacting with said valve for the purpose of simultaneously,connecting one of said reservoirs With the source of supply of saidliquid and the other of Said reservoirs with said discharge pipe; a.valve lchamber upon veach of said reServorSo,-said valve chambersbeingcomiected ,t0 Asaid cylinder `upon 'opposite sides-of said piston; anair pipe connecting Said valve chambers.; aljloat valve Within each ofsaid valve chambers adapted toelose said air pipe; an expansi'ble andcontractible member Within each of said reservoirs; and lfloat Valves atthe points Whereat said reservoirs connect With ,the port Within saidbod Iii Witness Ywhereof I claim the foregoing to be my own I hereunto,allix my signature in 'the presence of tivo subscribing Witnesses, atPortland, county of Multnomah, State of Oregon, this lthvday u.ofJuly1917.

G-iLBERT N. woonWARn.

lVitnesses:

NORMAN RICHARDS, @REN R. RICHARDS.

Commissioner of Ietenty

